Firstly if you have signed a contract then yes your landlady can ask you to honor your contract,but was it a contract or an agreement,anyway I cant see her chasing you for the rent through the courts as been a student if found guilty can always claim poverty.As to your probation officer stoping you moving back to the house legally,legal is not lawful,legal is statute law while lawful is common law.Statutes have the force of law under your concent,no concent no law.So you can quite freely move to whatever house you like.